Document Detail

Chemical compositions and bioactivities of crude polysaccharides from tea leaves beyond their useful date.
MedLine Citation:
PMID:  21946077     Owner:  NLM     Status:  MEDLINE    
The chemical compositions and bioactivities of crude tea polysaccharides (TPS) from the out-of-date tea leaves (beyond their useful date), namely Xihu Longjing (XTPS), Anxi Tieguanyin (TTPS), Chawentianxia (CTPS) and Huizhoulvcha (HTPS), in market were investigated. These TPS showed similar neutral sugar content and different distribution of molecular weight (1-800 kD). These crude TPS were mainly composed of rhamnose, arabinose, galactose, glucose, xylose, mannose, and galacturonic acid. IR spectra confirmed that these crude TPS were composed of polysaccharide, protein and uronic acids. These TPS showed similar DPPH scavenging activity and exhibited lower DPPH scavenging activities than Vc within 25-200 μg/mL. However, these TPS with higher concentrations (200-400 μg/mL) showed similar DPPH scavenging activity with Vc. HTPS exhibited significant higher superoxide anion scavenging activity than others TPS and gallic acid. XTPS showed significant higher inhibitory effects on α-glucosidase and α-amylase with inhibitory percentages of 64.35% and 82.24% than others TPS. TTPS, XTPS, and HTPS exhibited similar inhibition ability on α-d-glucosidase and α-amylase. The overdue tea leaves can be a resource of tea polysaccharides as function food.
Jianbo Xiao; Jianglei Huo; Huixian Jiang; Fan Yang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-09-19
Journal Detail:
Title:  International journal of biological macromolecules     Volume:  49     ISSN:  1879-0003     ISO Abbreviation:  Int. J. Biol. Macromol.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-10-24     Completed Date:  2012-02-10     Revised Date:  2012-04-12    
Medline Journal Info:
Nlm Unique ID:  7909578     Medline TA:  Int J Biol Macromol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  1143-51     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
Institute of Food Engineering, Shanghai Normal University, 100 Guilin Rd, Shanghai 200234, PR China.
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MeSH Terms
Antioxidants / analysis,  chemistry*,  pharmacology
Biphenyl Compounds / antagonists & inhibitors,  metabolism
Camellia sinensis / chemistry*
Food Analysis*
Food Preservation
Hexuronic Acids / analysis,  metabolism
Lipid Peroxidation / drug effects
Liver / drug effects,  metabolism
Monosaccharides / analysis,  metabolism
Picrates / antagonists & inhibitors,  metabolism
Plant Extracts / analysis,  chemistry*,  pharmacology
Plant Leaves / chemistry
Polysaccharides / analysis,  chemistry*,  pharmacology
Tea / chemistry*
Tissue Extracts
Uronic Acids / analysis,  metabolism
alpha-Amylases / antagonists & inhibitors,  metabolism
alpha-Glucosidases / antagonists & inhibitors,  metabolism
Reg. No./Substance:
0/Antioxidants; 0/Biphenyl Compounds; 0/Hexuronic Acids; 0/Monosaccharides; 0/Picrates; 0/Plant Extracts; 0/Polysaccharides; 0/Tea; 0/Tissue Extracts; 0/Uronic Acids; 14982-50-4/galacturonic acid; 1898-66-4/2,2-diphenyl-1-picrylhydrazyl; EC; EC
Erratum In:
Int J Biol Macromol. 2012 Apr 1;50(3):884

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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